Headache; hypotension. Tab: Ankle edema; flushing; GI discomfort. Weakness, shoulder & elbow pain, akathisia. Bradycardia. Rarely, sinus arrest; gynecomastia. Inj: Arrhythmia, itching, burning pruritus, sweating, constipation, nausea, vomiting, dizziness, paresthesia, dry mouth, dyspnea, edema,